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Faster and more accurate analytical methods are needed to support the advancement of recombinant adeno-associated virus (rAAV) production systems. Recently, biolayer interferometry (BLI) has been developed for high-throughput AAV capsid titer measurement by functionalizing the AAVX ligand onto biosensor probes (AAVX-BLI). In this work, an AAVX-BLI method was evaluated using Octet AAVX biosensors across four rAAV serotypes (rAAV2, -5, -8, and -9) and applied in an upstream and downstream processing context. AAVX-BLI measured the capsid titer across a wide concentration range (1 × 10
Leibiger et al. (Fri,) studied this question.